Amazon.com: The Transformers: The Movie 35th Anniversary Limited Edition Steelbook [4K UHD] : Eric Idle, Judd Nelson, Leonard Nimoy, Robert Stack, Lionel Stander, Orson Welles, Nelson Shin, Joe Bacal, Tom Griffith, Ron Friedman: Movies & TV

I'm giving this 5 stars because the initial issues were resolved, and therefore don't require a subtraction of a star.

Initially I had Ordered this movie a couple days ago. Received the initial shipment yesterday, and the 4K disc was a bad disc. It locked up during the scene of Starscream ejecting Megatron from the ship. This happened on two different players at the exact same spot, and even after cleaning the disc. In my experience, usually a player problem would happen at random, and with a specific player. Disc problems are consistent and can affect different players both the same, and also differently (in this case same issue, same part of the movie)

Anyway since I rarely have disc playback problems, I was pretty sure this was a bad disc, so issued an exchange, and the replacement came today. My initial hunch was correct as the new disc played perfectly.
So 5 stars to Amazon, and 5 Stars to the movie.

As far as the movie goes, I'm a transformers fan as well as a fan of 80's movies and cartoons / TV shows, etc as a whole. I own the standard blu-ray of this movie, and wanted to try the 4k upgrade. I typically don't buy UHD titles for 4k alone, but for HDR, which for me makes the biggest difference, and really to be honest, is the biggest difference in my experience. In fact, if they started mastering standard Blu-ray with HDR, I would be completely satisfied.

Some Technical details:

I own two UHD players, a Sony UBP-X800, and a UBP-X700. I'm aware of the problems people have reported about Sony players, however Sony has always been a good and dependable vendor for me.
I'll leave the tech details at this, because it was a disc issue, so only the player specs matter here.

I really liked how the new presentation of the film turned out. HDR really brightened up the movie as a whole and made it pop over the SDR versions. The soundtrack is good. I played the DTS-HD-MA 5.1 track, but the disc defaults to DTS-HD-MA 2.0. You can tell it's an older soundtrack, because of the tone, and the music, and the overall sound. However, I thought it sounded crisp and clear. Not real bass heavy, but it had it's moments when bass lets you know it's there.

Closing thoughts:
If you're a transformers fan, I'd get this version if you have an HDR / 4k Setup. I don't think you'll regret it.
Also, if your disc has playback problems the first time around, and cleaning it doesn't help. Chances are you got a defective disc, and a simple exchange should correct the problem.

Overall, hoping with Amazon has always been a positive experience for me. If there is anything else I think I should share, I'll add it later.